Traceback (most recent call last):
  File "/usr/share/hplip/ui/scrolltool.py", line 529, in CleanPensButton_clicked
    self.WaitUI)
  File "/usr/share/hplip/base/maint.py", line 984, in cleaning
    ok = dlg1()
  File "/usr/share/hplip/ui/scrolltool.py", line 487, in CleanUI1
    return CleaningForm(self, self.cur_device, 1).exec_loop() == QDialog.Accepted
  File "/usr/share/hplip/ui/cleaningform.py", line 34, in __init__
    self.CleaningText.setText(text % str(cleaning_level + 1))
TypeError: not enough arguments for format string